矩形脉冲激励下自复位墙的摇摆响应

发布时间：2018-04-17 18:25

本文选题：自复位墙 + 摇摆响应　；参考：《东南大学学报(自然科学版)》2017年04期

【摘要】：为了提高自复位墙在强震作用下的抗震性能,对其在矩形脉冲激励下的动力摇摆响应进行了研究.在假定墙体刚性和墙体-地基无滑移的基础上,建立了自复位墙的摇摆动力分析方程.引入小倾角假定对动力方程进行适当简化,并考虑墙体在摇摆过程中与基础碰撞的能量损失,通过理论推导得到了自复位墙摇摆响应的解析解.针对一个自复位墙算例,采用该方法进行动力摇摆分析,并与增量数值求解的结果进行对比验证.此外,基于动力方程中的恢复系数,给出了自复位墙等效黏滞阻尼的计算公式,研究了不同墙底基础碰撞界面材料特性对自复位墙摇摆响应的影响.结果表明:解析解能够反映墙体在矩形脉冲激励下的动力摇摆响应;自复位墙的等效黏滞阻尼随着恢复系数的增加而降低,二者基本成线性关系;墙体在摇摆过程中等效黏滞阻尼随着周期的增加而增大.
[Abstract]:In order to improve the seismic behavior of the self-reset wall under strong earthquake, the dynamic rocking response of the wall subjected to rectangular pulse excitation is studied.Based on the assumption that the wall is rigid and there is no sliding between the wall and the foundation, the rocking dynamic analysis equation of the self-reset wall is established.The dynamic equation is simplified with the assumption of small inclination angle, and the energy loss caused by the wall colliding with the foundation during the rocking process is considered. The analytical solution of the rocking response of the self-reset wall is obtained by theoretical derivation.For a self-reset wall example, the dynamic rocking analysis is carried out by using this method, and the results are compared with the incremental numerical results.In addition, based on the coefficient of recovery in the dynamic equation, a formula for calculating the equivalent viscous damping of the self-reset wall is given, and the influence of the material characteristics of the impact interface on the rocking response of the self-reset wall is studied.The results show that the analytical solution can reflect the dynamic rocking response of the wall under rectangular impulse excitation, and the equivalent viscous damping decreases with the increase of the restoration coefficient, which is basically linear.The equivalent viscous damping increases with the increase of the period.
【作者单位】：东南大学混凝土及预应力混凝土结构教育部重点实验室;
【基金】：国家自然科学基金资助项目(51208095) 江苏省“青蓝工程”资助项目江苏省六大人才高峰资助项目(JZ-002) 江苏省普通高校研究生实践创新计划资助项目(SJLX15_0033)
【分类号】：TU352.11

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